FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS - OPTION TO ACQUIRE NONCONTROLLING INTERESTS (Details) - Option to Acquire Noncontrolling Interests - USD ($) $ in Thousands	6 Months Ended
Jul. 31, 2018	Jul. 31, 2017
Changes in the estimated fair value of liability for contingent consideration measured using significant unobservable inputs (Level 3)
Fair value measurement at the beginning of the period	$ 2,950	$ 3,550
Change in fair value, recorded in operating expenses	(50)	350
Fair value measurement at the end of the period	$ 2,900	$ 3,900

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

No definition available.

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- Definition

Amount of gain (loss) recognized on the income statement for financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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- Definition

Fair value of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

+ Details

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